我正在開(kāi)發(fā)一個(gè) Spring 應(yīng)用程序，它記錄用戶(hù)請(qǐng)求響應(yīng)（將其發(fā)送到數(shù)據(jù)庫(kù)并檢索它）。獲取記錄代碼是這樣的（控制器）：/**     * this method fetches all userrequest response records from user_request_response table     * @return     */    @CrossOrigin(origins = "*")    @GetMapping(path="/all")    public @ResponseBody Iterable<UserRequestResponse> getAllRequestResponseRecords() {        return userRequestResponseRepository.findAll();    }Dao code:import org.springframework.data.jpa.repository.Query;import org.springframework.data.repository.CrudRepository;import com.abc.datacollection.entity.UserProjection;import com.abc.datacollection.entity.UserRequestResponse;public interface UserRequestResponseRepository extends CrudRepository<UserRequestResponse, Integer> {public static final String FIND_QUERY =             "select new com.abc.datacollection.entity.UserRequestResponse(user.u_httpstatus ,user.u_queryparam) from UserRequestResponse user";    @Query(value = FIND_QUERY)    List<UserProjection> getAllRequestResponseRecords();}具有 getter 和 setter 的類(lèi)：（刪除了一些變量及其 getter 和 setter）import java.sql.Date;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;@Entity // This tells Hibernate to make a table out of this classpublic class UserRequestResponse {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    private String u_httpstatus;    private String u_error_message;    private String u_queryparam;public UserRequestResponse(String u_httpstatus, String u_queryparam) {        this.u_httpstatus = u_httpstatus;        this.u_queryparam = u_queryparam;    }    public int getSys_id() {        return sys_id;    }public String getU_httpstatus() {            return u_httpstatus;        }MySQL查詢(xún)示例（我試圖將查詢(xún)放入CrudRepository中的java代碼中，InternSearchAnalytics.user_request_response是表的名稱(chēng)）：select u_httpstatus, u_queryparam from InternSearchAnalytics.user_request_response但是，當(dāng)我運(yùn)行 java 代碼并點(diǎn)擊生成的端點(diǎn)時(shí)，我得到了所有字段。有人可以幫我嗎？我已經(jīng)被這個(gè)問(wèn)題困擾了兩天了。